chore: use UTC instead of GMT when possible (#2275)

providers/dns/brandit/internal/client.go

@@ -178,17 +178,12 @@ func (c *Client) do(ctx context.Context, query url.Values, result any) error {
 }
 
 func sign(apiUsername, apiKey string, query url.Values) (url.Values, error) {
- location, err := time.LoadLocation("GMT")
- if err != nil {
- return nil, fmt.Errorf("time location: %w", err)
- }
-
- timestamp := time.Now().In(location).Format("2006-01-02T15:04:05Z")
+ timestamp := time.Now().UTC().Format("2006-01-02T15:04:05Z")
 
  canonicalRequest := fmt.Sprintf("%s%s%s", apiUsername, timestamp, defaultBaseURL)
 
  mac := hmac.New(sha256.New, []byte(apiKey))
- _, err = mac.Write([]byte(canonicalRequest))
+ _, err := mac.Write([]byte(canonicalRequest))
  if err != nil {
  return nil, err
  }

providers/dns/nifcloud/internal/client.go

@@ -121,12 +121,7 @@ func (c *Client) do(req *http.Request, result any) error {
 
 func (c *Client) sign(req *http.Request) error {
  if req.Header.Get("Date") == "" {
- location, err := time.LoadLocation("GMT")
- if err != nil {
- return err
- }
-
- req.Header.Set("Date", time.Now().In(location).Format(time.RFC1123))
+ req.Header.Set("Date", time.Now().UTC().Format(http.TimeFormat))
  }
 
  if req.URL.Path == "" {

providers/dns/websupport/internal/client.go

@@ -150,12 +150,7 @@ func (c *Client) DeleteRecord(ctx context.Context, domainName string, recordID i
 func (c *Client) do(req *http.Request, result any) error {
  req.Header.Set("Accept-Language", "en_us")
 
- location, err := time.LoadLocation("GMT")
- if err != nil {
- return fmt.Errorf("time location: %w", err)
- }
-
- err = c.sign(req, time.Now().In(location))
+ err := c.sign(req, time.Now().UTC())
  if err != nil {
  return fmt.Errorf("signature: %w", err)
  }